employ vs toil

employ

verb
  • To make busy. 

  • To hire (somebody for work or a job). 

  • To use (somebody for a job, or something for a task). 

noun
  • The state of being an employee; employment. 

toil

verb
  • To work (something); often with out. 

  • To struggle. 

  • To labour; work. 

  • To weary through excessive labour. 

noun
  • Trouble, strife. 

  • Labour, work, especially of a grueling nature. 

  • A net or snare; any thread, web, or string spread for taking prey. 

How often have the words employ and toil occurred in a corpus of books? (source: Google Ngram Viewer )